Phyto-Depuration Towers are located in Porte de la Chapelle, on the North of Paris peripherique ring. These are ecological towers collecting and recycling the rain water. The purpose is to reduce water consumption in daily life. The design is inspired by Lotus Plant. Lotus has a large leaf like water receiver and it stands on its very thin trunk. Branching system supports the leaf in any kind of circumstance. On the other hand, filtering water into usable water is applied using depuration system like multi-waterfall.The generation of the sizes and positions is systematically parametric. It starts by collecting as many as relevant datas as possible, as inputs, to respond to the need, as output.